Hardiness: USDA Zone 3a: to -39.9 °C (-40 °F) USDA Zone 3b: to -37.2 °C (-35 °F) USDA Zone 4a: to -34.4 °C (-30 °F) USDA Zone 4b: to -31.6 °C (-25 °F) USDA Zone 5a: to -28.8 °C (-20 °F) USDA Zone 5b: to -26.1 °C (-15 °F) USDA Zone 6a: to -23.3 °C (-10 °F) USDA Zone 6b: to -20.5 °C (-5 °F) USDA Zone 7a: to -17.7 °C (0 °F) USDA Zone 7b: to -14.9 °C (5 °F) USDA Zone 8a: to -12.2 °C (10 °F)
Sun Exposure: Light Shade
Other details: Average Water Needs; Water regularly; do not overwater
On Apr 29, 2012, sandraky from Louisville, KY wrote:
Found it in a discount bin, has grown beautifully in part sun and deep shade. The one plant is now five.I have it next to a rue - it covers the ugly knees and matches the colour exactly, so the foliage shape contrast is highlighted.
One of my favorites
On May 26, 2003, smiln32 from Oklahoma City, OK (Zone 7a) wrote:
Mine is not an especially fast grower, but I think that has to do with a shorter dormancy period here in the south. It has rich color and upright habit, making it a lovely counterpart to moundlike hostas.
On May 7, 2002, Greenwood from Bonifay, FL (Zone 8a) wrote:
Krossa Regal starts the season with powdery blue foliage by mid summer the vase shaped mound turns dark green. The flowering habits are notable with scapes 3' to 6' tall.
This plant has been said to grow in the following regions:
, (2 reports) Montgomery, Alabama Oxford, Connecticut Bonifay, Florida Cordele, Georgia Druid Hills, Georgia Lawrenceville, Georgia Marietta, Georgia Caseyville, Illinois Edwardsville, Illinois Machesney Park, Illinois Nilwood, Illinois Galena, Indiana Olathe, Kansas Louisville, Kentucky White Oak, Maryland Lexington, Massachusetts Uxbridge, Massachusetts Ann Arbor, Michigan Royal Oak, Michigan Anoka, Minnesota Minneapolis, Minnesota Lothair, Montana Cape May Court House, New Jersey Clearbrook Park, New Jersey Columbia, New Jersey Ramblewood, New Jersey Cayuga Heights, New York Elizabeth City, North Carolina Fearrington, North Carolina Belfield, North Dakota Medora, North Dakota Fruit Hill, Ohio Glouster, Ohio Salem, Oregon Churchill, Pennsylvania East Norriton, Pennsylvania North Augusta, South Carolina Rockwood, Tennessee Broadway, Virginia Inglewood-finn Hill, Washington (2 reports) Augusta, Wisconsin Dodgeville, Wisconsin Eau Claire, Wisconsin Lake Delton, Wisconsin Marion, Wisconsin Thiensville, Wisconsin